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Thread: "20 Practical" cartridge?

  1. #1
    Boolit Master
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    "20 Practical" cartridge?

    Just read an article (sorry I can't link to it right now) about a .20 caliber cartridge made by necking .223 brass, intended for AR platforms. All well and good if you like the idea...
    Claimed ballistics were 40gr. bullet at 3900+fps. Again, that's fine if it's what you want but some years ago I followed several gunwriters' exploits with small-bore, mach 4 cartridges and it seemed like barrel life wasn't much due to the nature of the fouling under those conditions. Has anyone been able to solve that problem or was it just a matter of using better cleaning products?
    Warning: I know Judo. If you force me to prove it I'll shoot you.

  2. #2
    Boolit Master

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    If I was going to assemble a sub-caliber AR, it would be the 20 practical. I dont hear of any problems you mentioned regarding the 204 ruger.
    So, I cant see where the 20 practical would be an issue. It falls just under the 204 in case capacity and performance.

  3. #3
    Boolit Master

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  4. #4
    Boolit Master
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    Thanks!
    Warning: I know Judo. If you force me to prove it I'll shoot you.

  5. #5
    Boolit Master
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    To get 40gr 20 calibers up to 4k your going to need BR capacities. I have two 20 tacticals and a 204 Ruger even with 26" barrels 3750fps is about the top end for 40s.
    Doug
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    Sticks and stones may break my bones but hollow points expand on impact.

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  6. #6
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    Quote Originally Posted by BK7saum View Post
    thats a great one. so is todd kindler's book, the terrific twenties.


    i luv the 20 vartarg so much, that i've gotten rid of all varmint rifles. (223 and ai, 22-250 and ai, 17 rem)

  7. #7
    Boolit Bub
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    dk17hmr, I'm really interested in the 20 Practical. What platform are yours built on?
    "Every man thinks meanly of himself for not having been a soldier, or not having been at sea." --Dr. Johnson

  8. #8
    Boolit Master
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    Bolt action and a 14" contender barrel. They are 20 Tacticals though.
    Doug
    .................................................. ........................................
    Sticks and stones may break my bones but hollow points expand on impact.

    Taxidermists are cheaper than surgeons....keep shooting

    ΜOΛΩΝ ΛΑΒΕ

    Some people measure success in Minutes of Angle

  9. #9
    Boolit Bub
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    I've been thinking in terms of an AR in 20 Practical, didn't even think of a Contender. How much does the 14" lose?
    "Every man thinks meanly of himself for not having been a soldier, or not having been at sea." --Dr. Johnson

  10. #10
    Boolit Master
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    I have never chronographed the 14" vs the 25" 20 tacticals. I need to do that some day.
    Doug
    .................................................. ........................................
    Sticks and stones may break my bones but hollow points expand on impact.

    Taxidermists are cheaper than surgeons....keep shooting

    ΜOΛΩΝ ΛΑΒΕ

    Some people measure success in Minutes of Angle

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check